Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5a07d8ee3664f5e…

MALICIOUS

PDF

71.5 KB Created: 2021-02-12 08:21:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 894d19294a2629fced1444729d4a6e26 SHA-1: da28cffbe727dccfd443e71b79d33db3b1aa5ae4 SHA-256: d5a07d8ee3664f5e52d28f2fcf26d6af306396c96f59c56055f050ed92d5d9dc
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://seumenha.ru/wix?keyword=yeti+online+donation+request PDF link annotation
    • https://cdn.sqhk.co/jigavozef/eWhh1gi/unicorn_minecraft_skins_girl.pdfIn PDF document text
    • https://betirowi.weebly.com/uploads/1/3/4/6/134661799/xujok.pdfIn PDF document text
    • https://xoxitugupara.weebly.com/uploads/1/3/1/3/131383959/gomerufo.pdfIn PDF document text
    • http://sayfelengs.space/history_of_european_union_timelinepxzx2.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/fiiVggO/61243686984.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453551/normal_60258f153c087.pdfIn PDF document text
    • http://uscreditinquiry.info/block_format_letter_addressprc4m.pdfIn PDF document text
    • https://bevubulik.weebly.com/uploads/1/3/2/6/132680874/75e19ba6353.pdfIn PDF document text
    • http://bella24.xyz/rusuberenoduwekolerimenaubtia.pdfIn PDF document text
    • http://libralab.digital/adobe_illustrator_course_freehs1r6.pdfIn PDF document text
    • http://funseeds.site/gundam_iron_blooded_orphans_mikazukizz7im.pdfIn PDF document text
    • https://xaxibilezulaf.weebly.com/uploads/1/3/4/0/134096047/5018606.pdfIn PDF document text
    • https://vozokeku.weebly.com/uploads/1/3/1/8/131857213/6cc0b.pdfIn PDF document text
    • https://nitiruminaxodax.weebly.com/uploads/1/3/0/7/130738633/diturerumeluf_pumorogeza_fevukamukopu_jetumafeneju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472481/normal_5febfce984851.pdfIn PDF document text
    • https://laratenin.weebly.com/uploads/1/3/2/8/132816160/776850.pdfIn PDF document text
    • https://cdn.sqhk.co/zativojor/eqIV6y9/harvest_right_freeze_dryer_recipes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC88 4908 bytes
SHA-256: e3f1d21692f83d3b9bc1e6b3c823720839bed4a01457aea70b487ed7e1d5dee5
font_01_sfnt_off0000ed3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3C 10328 bytes
SHA-256: c1dffbb69797131c3bd47b3837a73f5157b9ed2bba3d4b041136e245f8436116

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